Stylus and touch input system

ABSTRACT

A touch input system including a stylus and a display device is provided. The stylus includes a battery module, a touch portion, a transducer module and a RF transmitting module. When a contact pressure is acted on the touch portion, the touch portion is electrically connected to the battery module by the contact pressure and emits a light signal. The display region receives and reacts to the light signal, and the contact pressure is transformed into an electrical signal by the transducer module. The RF transmitting module is electrically connected to the transducer module and transmitting the electrical signal. The display device includes a display region and a RF receiving module.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation of U.S. application Ser. No.12/984,613, filed Jan. 5, 2011, which claims the benefit of prior U.S.Provisional Application No. 61/293,209, filed on Jan. 8, 2010, each ofwhich are incorporated by reference in their entirety.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention generally relates to a touch input system. Moreparticularly, the present invention relates to an input device suitablefor emitting light and a touch screen using the input device.

2. Description of Related Art

Display panels traditionally serve the role of displaying theinformation or the output from a system, while other input device ordevices provide inputs to the system. Interactive devices, such as atouch panel that can receive a user's input via touching the displaypanel, combines both output and input functions and allow a user tointeract with the display or the system coupled to the display. As anexample, devices such as personal digital assistants (PDAs), mobilephones, personal computers (PCs), tablet PCs, etc. have incorporatedtouch panels for providing users with more input choices.

Conventional touch panels or touch screens have a number of differentdesigns, such as resistive type, surface-wave type, capacitive type, andinfrared-ray type designs. All of these designs typically requirecombining a display device with a separate touch panel sheet. No matterwhat type of touch panel, it tries to provide a more convenient way forusers, for example, the resistive type, surface-wave type, capacitivetype, and infrared-ray type touch panel are operated by users' fingersor stylus. The in-cell type optical touch display panels could beoperated by light or shadow, and the touch position is located by photosensors designed in the in-cell type display panel. Therefore, touchdisplay panel includes a display panel suitable for sensing a lightsignal emitted or blocked by a stylus to be operated. When a optical penused as a positional indicator of the in-cell type optical touch displaypanel, the display panel is capable of displaying a line according tothe light signal emitted by the stylus. Several arrangements have beenproposed for an optical pen which has a pressure sensitive mechanism,and allowed to produce a certain change when the pen pressure wasapplied thereto.

SUMMARY OF THE INVENTION

The present invention is to provide a touch input system, including ainput device and a display device.

The present invention is to provide a stylus suitable for sensing thedepressing force by its pressure sensitive mechanism disposed in the tipof the stylus. The stylus includes a main body and a touch portion,wherein the main body comprises a pressure sensing mechanism, atransducer module, an RF transmitting module, and a battery module. Thetouch portion is disposed at the front of the main body, and is suitablefor contacting with the operation surface.

As embodied and broadly described herein, the present invention providesa touch input system including an optical stylus and a display devicefor locating the touch position by the optical stylus. The stylusincludes a main body and a touch portion capable of emitting light,wherein the main body comprises a transducer module, a RF transmittingmodule, and a battery module. The touch portion disposed at the frontend of the stylus is electrically connected to the battery module by thecontact pressure and emits a light signal continuously when a contactpressure is acted on the touch portion. The display device includes adisplay region, and a RF receiving module essentially consisted of a RFreceiver and a built-in antenna. The RF receiver is electricallyconnected to the display region and the built-in antenna receives theelectrical signal within a predetermined frequency range.

Some example of the present invention may provide a stylus including ahousing and a touch portion. The housing has a front end, a back endopposite to the front end and an opening formed at the front end. Thetouch portion is sliding disposed at the opening along an axis, whereinthe touch portion is suitable for contacting an operation surface tomove into the housing. The housing has a capacity of a battery moduleand a detector; in some cases, it further comprises a transducer moduleand a RF transmitting module. A blocking plate is disposed in the middleof the housing of the stylus, and is disposed between the battery moduleand an elastic element. The detector is fixed to the blocking plate andused for detecting a motion of the touch portion to obtain an analogsignal. The elastic element and the touch portion is located on the axisof the housing, wherein the elastic element is fixed on the blockingplate and the touch portion is sliding disposed at the opening, suchthat the touch portion contacts the operation surface to move into thehousing, the elastic element is compressed between the blocking plateand the touch portion. The touch portion is electrically connected tothe battery module and emits a light signal continuously while writing.However, the touch portion is recovered by an elastic force of theelastic element when the touch portion is distant from the operationsurface. Meanwhile, the electrical connection between the touch portionand the battery module is terminated.

Another example of the present invention may provide a stylus includinga pipe, a touch portion, a first magnetic element and a second magneticelement. The pipe has a front end, a back end opposite to the front endand an opening formed at the front end, wherein a diameter of theopening is smaller than a diameter of the pipe. The touch portion issliding disposed at the opening, and at least a part of the touchportion is located in the pipe. The first magnetic element is disposedin the pipe and having a through hole, and a diameter of the throughhole is not less than the diameter of the opening. Therefore, the secondmagnetic element is fixed to the touch portion located in the pipe, andthe first magnetic element is located between the second magneticelement and the opening. The second magnetic element is driven to moveaway from the first magnetic element when the touch portion is driven tomove toward the back end by a force resisting a magnetic attractiveforce generated between the first magnetic element and the secondmagnetic element.

Another example of the present invention may provide an input deviceincluding a pipe, a touch portion, a protrusion and a switch element.The pipe has a front end, a back end opposite to the front end and anopening formed at the front end, wherein a diameter of the opening issmaller than a diameter of the pipe. The touch portion is slidingdisposed at the opening, and a part of the touch portion is located inthe pipe. The protrusion, the switch element and the touch portion areon the central axis of the stylus. The switch element is fixed andelectrically connected to the touch portion and has an elastic elementto provide an elastic force for recovery. When the touch portion isdriven to move toward the back end by a depressing force, the switchelement is also driven to contact the protrusion for actuating the touchportion to emit a light signal continuously, and the elastic element iscompressed between the touch portion and the protrusion.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are included to provide a furtherunderstanding of the invention, and are incorporated in and constitute apart of this specification. The drawings illustrate embodiments of theinvention and, together with the description, serve to explain theprinciples of the invention.

FIG. 1 illustrates a touch input system according to an embodiment ofthe present application.

FIG. 2 partially illustrates a stylus during exerting according to anembodiment of FIG. 1.

FIG. 3 illustrates a touch input system according to another embodimentof the present application.

FIG. 4 partially illustrates a tip of the stylus leaves the operationsurface.

FIG. 5 illustrates a stylus according to further another embodiment ofthe present application.

FIG. 6 illustrates the touch portion contacts the operation surface ofFIG. 5.

FIG. 7 partially illustrates a stylus according to further anotherembodiment of the present application.

FIG. 8 illustrates a touch input system according to further anotherembodiment of the present application.

FIG. 9 illustrates the touch portion contacts the operation surface ofFIG. 8.

FIG. 10 illustrates a light emitting glove according to an embodiment ofthe present application.

FIG. 11 illustrates a finger portion of the light emitting glove of FIG.10.

FIG. 12 illustrates an operating manner of the light emitting glove ofFIG. 10.

DESCRIPTION OF THE EMBODIMENTS

Reference will now be made in detail to the present embodiments of theinvention, examples of which are illustrated in the accompanyingdrawings. Wherever possible, the same reference numbers are used in thedrawings and the description to refer to the same or like parts.

FIG. 1 illustrates a touch input system according to an embodiment ofthe present application. FIG. 2 illustrates the touch portion contactsthe display region of FIG. 1. Referring to FIG. 1, the touch inputsystem 100 includes a stylus 110 and a display device 120. The stylus110 has a two-terminal main body 112 including a front end 112 a and aback end 112 b, wherein the front end 112 a is separated by a blockingplate 115. The main body 112 comprises a transducer module 118 and an RFtransmitting module 119, and a battery module 114. The blocking plate115 is disposed between the battery module 114 and an elastic conductor117. The front end 112 a has an opening 112 c at the pen tip, and thetouch portion 116 is sliding disposed in the opening 112 c along an axisA. The touch portion 116 may have a pillar 116 a to extend into thefront end 112 a, and the pillar 116 a, the elastic conductor and thetouch portion 116 are all on the axis A. The axis A is perpendicular tothe blocking plate 115 and pass through the center of the stylus 110. Anelastic conductor 117, such as a metal spring or a conducting sponge, isdirectly connected to the touch portion 116 or via pillar 116 a,depending on the function of the stylus. Whether the elastic conductor117 is fixed to the pillar 116 a or the blocking plate 115, the pillar116 a is disposed between the touch portion 116 and the elasticconductor 117, and they all move along the axis A. Taking FIG. 1 forexample, the three elements on the axis A, including the touch portion116, the pillar 116 a and the elastic conductor 117, can be regarded asa switch for lighting up the touch portion 116. The touch portion 116can be a light emitting diode (LED), a light bulb, a laser, and so on.The transducer module is used for transforming the contact pressure intoan electrical signal by the transducer module, and the electrical signalis directly proportional to the contact pressure depressed by a user.The RF transmitting module is electrically connected to the transducermodule, and sending the electrical signal to a RF receiving moduleembedded in the display device. The RF transmitting module isessentially consisted of a RF transmitter and an antenna fortransmitting depressing pressure information.

Referring to a display device 120, it includes a display region 122 withan operation surface of the display device 120 and an RF receivingmodule 124. The display device 120 further includes a light sensor array126 arranged in a pixel electrode array of the display region 122.Examples of the light sensor array may be found in but are not limitedto commonly assigned applications, i.e., U.S. patent application Ser.No. 11/536,403, “Interactive Display Devices and Methods of Making theSame,” filed Sep. 28, 2006, and U.S. patent application Ser. No.11/777,887, “Photo Detector Array with Thin-Film Resistor-CapacitorNetwork,” filed Jul. 13, 2007, which is a continuation-in-part of U.S.patent application Ser. No. 11/534,680, “Photo Detector Array,” filedSep. 25, 2006. Other sensor elements capable of supporting a touch panelbased on a pressure source or a non-touch panel based on an opticalsource may also be applicable to the present invention. In one example,the display device 120 may include but is not limited to one of aphoto-sensing panel, an organic light-emitting diode (OLED) panel and alow temperature poly silicon (LTPS) panel. Accordingly, the displayregion of the display device 120 not only receives the light signalemitted by the optical stylus, but also reacts to the depressingpressure exerted onto the display region. The RF receiving module 124embedded in the display device 120 is essentially consisted of areceiving antenna and a RF receiver.

FIG. 2 partially illustrates a stylus during exerting against thedisplay device according to an embodiment of FIG. 1. The light detector113 a is suitable for detecting a light 60 emitted by the light emittingelement 113 b to obtain a variation of a distance between the lightemitting element 113 b and the light detector 113 a, wherein theabove-mentioned distance is shortened while the contact pressure actedon the touch portion 116 is increased. The light detector 113 a is, forexample, a photo transistor, a photo diode or a photo-sensitiveresistor. The light emitting element 113 b preferably provides awavelength that the light detector 113 a is sensitive to. The light 60is detected by the light sensor array 126 for locating touch position,and simultaneously provided information for pressure strength operatedby the user. One skilled in the art will appreciate that the light 60 isnot restricted to a visible light, other electromagnetic wave, such asinfrared light, ultraviolet light or other radiation, can be sensed bythe light detector 113 a and the light sensor array 126 are favorableoptions. Referring to FIG. 1 and FIG. 2, the touch portion 116 isexerted on the working plane, such as display device 120, when a user iswriting by the stylus 110. The elastic conductor 117 would be compressedand electrically contact with the battery module 114, such that thetouch portion 116 emits the light 60. The light sensor array 126embedded in the display device 120 is capable of locating the touchposition by sensing the light 60, but the line width depicted by a usercan not be shown. The detector 113 a is connected with the transducermodule 118, and electrically connected with the battery module 114. Thedetector 113 a receives differential light amount in accordance withdistance between the touch portion 116 and the detector 113 a when theuser is operating the stylus 110. The distance between the touch portion116 and the detector 113 a is inverse proportional to the depressingforce from the user, and the light sensed by the detector 113 a will beconverted to an analog signal. The analog signal can be transmitted tothe transducer 118, and converted to a digital signal.

FIG. 3 is a schematic view illustrating another embodiment of thepresent application. The main body 312 is, for example, a housing havinga front end 312 a, a back end 312 b opposite to the front end 312 a andan opening 312 c formed at the front end 312 a, wherein the touchportion 316 is sliding disposed at the opening 312 c along an axis A.The battery module 314 is disposed in the main body 312, and separatedfrom the front end 312 a via the blocking plate 315. The elasticconductor 317 is, for example, a spring and connected to the touchportion 316 to be located between the touch portion 316 and the blockingplate 315 along the axis A. When the touch portion 316 is pushed towardthe back end 312 b when exerting the stylus 310 by a user, the elasticconductor 317 is compressed between the blocking plate 315 and the touchportion 316. Thus, when no depressing force is applied on the stylus (asFIG. 4 showing), the touch portion 322 is recovered by an elastic forceof the elastic conductor 317. In other embodiments, the elasticconductor 317 also could be an elastic metal slice or a magnet with aconductive formed plastic. Referring back to FIG. 3, the touch portion316 is sliding disposed at the main body 312, when the touch portion 316is applied to the display region 322 to generate a force on the touchportion 316. Then, the touch portion 316 will be driven to move towardthe blocking plate 315 and compress the elastic conductor 317. The touchportion 316 is electrically connected to the battery by the elasticconductor 317 and the conductive pillar 316 a and emits a light 50continuously. Simultaneously, the magnitude of the force will be sensedby the pressure sensitive module consisted of detector 313 a andemitting element 313 b.

In this embodiment, the light 50 irradiated from the touch portion 316is used for the light sensor array 326 embedded in the display device320, not for detector 313 a. The detector 313 a fixed to a surfacefacing the touch portion 316 of the blocking plate 315 is responsive tothe intensity of the light 70 while operating the stylus 310. Theemitting element 313 b emitting the light 70 is fixed to a pillar 316 aof the touch portion 316. The detector 313 a is used for detecting alight 70 emitted by the light emitting element 313 b to obtain avariation of a distance between the light emitting element 313 b and thelight detector 313 a. The distance is shortened while the force acted onthe touch portion 316 is increased, and the light detector 313 a iscapable of transferring analog signals with the magnitude of the forceaccordingly. Therefore, the detector 313 a and the emitting element 313b are regarded as a pressure sensitive module, responsive to the forceexerted by the user while operating the stylus 310. The light 70 is onlysensed by the detector 313 a of the pressure sensitive module, becausethe irradiating direction of the light 70 is opposite to the one oflight 50. The type of the detector 313 a and emitting element 313 b arenot restricted, for example, the emitting element 313 b can be anelectromagnetic wave emitting element, such as LED, bulb, or laser, evenother element emitting any invisible radiation, and the detector 313 amust be a sensor capable of sensing the signal from the emitting element313 b, such as, a photo transistor, a photo diode, a photo-sensitiveresistor and so on.

In another embodiment, the emitting element 313 b is a magnetic element,the detector 313 a is capable of detecting magnetic prosperity. In otherwords, the pressure sensitive module includes a magnetic element 313 band a magnetic detector 313 a. The magnetic element 313 b is fixed tothe touch portion 316. The magnetic detector 313 a is fixed to theblocking plate 315 and suitable for detecting a magnetic force generatedbetween the magnetic detector 313 a and the magnetic element 313 b toobtain a variation of a distance between the magnetic element 313 b andthe magnetic detector 313 a. The magnetic element 313 b is, for example,a magnet or any object suitable for generating magnetic force and thedetector 313 a must be a sensor capable of sensing the signal from themagnetic element 313 b.

The transducer module 318 disposed in the main body 312 is used toprocessing the signal from pressure sensitive module including detector313 a and emitting element 313 b, and transforming the analog signal 70into a digital format, wherein the intensity of the signal 70 isdirectly proportional to the magnitude of the force exerted by a user.The RF transmitting module 319 may be disposed at the back end 312 b ofthe main body, or at the wall of the main body 312 and electricallyconnected to the transducer module 318. In one embodiment, the RFtransmitting module 319 is used for transmitting digital signals withina predetermined frequency range, and the RF receiving module 324disposed in the display device 320 is capable for receiving signals withthe same specific frequency, such that other signal out of the specificfrequency range regarded as an interference is prevented.

According to the present invention, the stylus is able to transmit anelectrical signal directly proportional to a contact pressure applied tothe touch portion of the stylus, and the display device is able toreceive the electrical signal to display image according to itsinformation. For example, a width of the line showed by the displaydevice is able to be promptly changed by respective electrical signalstransmitted from the stylus, such that the operation of the touch inputsystem is more flexible. Therefore, in addition to the location touchedby the stylus 310, the display region 322 shows line width responsive tothe magnitude of the signal 70 while writing. The touch portion 316 isexerted on the display region 322 to generate the signals representingline width on the display region 322 by the wireless communication. TheRF receiving module 324 is electrically connected to the display region322 and receives the digital signal from the RF transmitting module 319within a predetermined frequency range. The display region 322 issuitable for displaying a line width depicted by the user according tothe signal 70 sensed by the detector 313 a. In other words, the locationand the width of the line are both displayed on the display device 320,the line width is changed by signals 70 and the line location is basedon signal 50, such that the operation of the touch input system 300 ismore flexible.

FIG. 5 illustrates a stylus according to further another embodiment ofthe present application. FIG. 6 illustrates the touch portion contactsthe operation surface of FIG. 5. Referring to FIG. 5 and FIG. 6, thestylus 410 includes a pipe 412, a touch portion 414, a first magneticelement (a fixed magnetic element) 416 and a second magnetic element (amoveable magnetic element) 418. The pipe 412 has a front end 412 a, aback end 412 b opposite to the front end 412 a and an opening 412 cformed at the front end 412 a, wherein the diameter of the opening 412 cis smaller than the diameter of the pipe 412. The touch portion 414 issliding disposed at the opening 412 c, wherein at least a part of thetouch portion 414 is located in the pipe 412.

The first magnetic element 416 fixed to the inner wall of the pipe 412and has an annular shape, in which the diameter of the through hole 416a is larger or substantially equal to the diameter of the opening 412 c,such that the touch portion 414 sliding disposed at the opening 412 ccan penetrate the through hole 416 a. The second magnetic element 418and the touch portion 414 are bonded together, and regarded as a signalportion. When the depressing force is applied on the stylus, the touchportion 414 and the second magnetic element 418 may move together. Dueto the size of the second magnetic element 418 is larger than thethrough hole 416 a, the second magnetic element 418 is always betweenthe conductive element 411 and the first magnetic element 416 whetherthe exertion force is applied or not. As shown by this example, thefirst magnetic element 416 is located between the second magneticelement 418 and the opening 412 c. The exertion force is able to resista magnetic attractive force generated between the first magnetic element416 and the second magnetic element 418, at the same time, the secondmagnetic element 418 is driven to move away from the first magneticelement 416 (as FIG. 6 shown).

The stylus 410 further includes a battery module 415, a detector 417 anda converter 419. The battery module 415 is disposed in the pipe 412 andincludes a blocking plate 415 a and at least a battery 415 b (showingtwo). The touch portion 414 is electrically connected to the batterymodule 415 and emits a light signal 40 actuating the operation surface80. The detector 417 is suitable for detecting a magnetic force producedfrom the second magnetic element 418 to obtain an analog signalrepresenting a variation of a distance between the second magneticelement 418 and the detector 417, and the above-mentioned distance isshortened while the contact pressure acted on the touch portion 414 isincreased. The converter 419 disposed in the pipe 412 is electricallyconnected to the detector 417, and capable of transducing the analogsignal into a digital signal and outputting the digital signal to the RFtransmitting module 413. The RF transmitting module is essentiallyconsisted of a RF transmitter and a transmitting antenna, and issuitable for transmitting the digital signal to the RF receiving module90 by the wireless communication. In this embodiment, a conductiveelement 411 is disposed on the blocking plate 415 a, and located betweenthe blocking plate 415 a and the touch portion 414. The conductiveelement 411, for example, a conductive sponge, would be compressed andelectrically contact with the battery module 415. When the exertionforce is stronger than the magnetic attractive force between the firstand the second magnetic element (416 and 418), the touch portion 414 iselectrically connected to the battery via the conductive element 411 andemits light 40. The magnetic attractive force is used for driving thetouch portion 414 to recover from the state shown in FIG. 6 to the stateshown in FIG. 5.

In another embodiment, the conductive element 411 is not compressive, isjust regarded as switch. A force exerted by a user is stronger than themagnetic attractive force of the two magnetic elements when writing, thetouch portion 414 is electrically connected to the battery via theconductive element 411 and emits the light 40. Once the stylus is notbeen exerted, the conductive element 411 and the touch portion 414 willbe separated by the magnetic attractive force of the two magneticelements. The touch portion 414 may contact the operation surface 80 andemit light while the contact pressure being stronger than the magneticattractive force of the two magnetic elements. In addition, the thirdmagnetic element could be added to enhance the separation strength ofthe conductive element and the touch portion, the description detailedin FIG. 7. FIG. 7 partially illustrates a stylus according to furtheranother embodiment of the present application. Comparing with the stylus410 of FIG. 5, the stylus 510 of FIG. 7 further includes a thirdmagnetic element 511. The third magnetic element 511 is disposed at theblocking plate 515 a and facing the second magnetic element 518, whereina magnetic repulsive force is generated between the second magneticelement 518 and the third magnetic element 511, such that a greatermagnetic force is provided for the touch portion 514 to recover. In oneexample, the magnetic repulsive force acts as the elastic member to berecovered easily in order to make the style of drawing smooth andeasily.

FIG. 8 illustrates a stylus according to further another embodiment ofthe present application. FIG. 9 illustrates the touch portion contactsthe operation surface of FIG. 8. Referring to FIG. 8 and FIG. 9, thestylus 610 includes a pipe 612, a touch portion 614, a protrusion 616and a switch element 618. The pipe 612 has a front end 612 a, a back end612 b opposite to the front end 612 a and an opening 612 c formed at thefront end 612 a, wherein a diameter of the opening 612 c is smaller thana diameter of the pipe 612. The touch portion 614 is sliding disposed atthe opening 612 c, wherein at least a part of the touch portion 614 islocated in the pipe 612.

The stylus 610 further includes a battery module 615 and a converter617, and the protrusion 616. The battery module 615 is disposed withinthe pipe 612 and includes a blocking plate 615 a and at least a battery615 b (showing two). The protrusion 616 is formed on the blocking plate615 a of the pipe 612 and can be screwed forward or backward to adjustthe suitable distance between the protrusion 616 and the switch element618. The switch element 618 is fixed and electrically connected to thetouch portion 614 and has an elastic element 618 a. When the touchportion 614 is driven to move toward the back end 612 b by an exertionforce, the switch element 618 is also pushed forward to contact theprotrusion 616 for actuating the touch portion 614 to emit a lightsignal 30 actuating the operation surface 20 (as FIG. 9 shown). Theswitch element 618 comprises an elastic element 618 a facing theprotrusion 616 and the elastic element 618 a is compressed between thetouch portion 614 and the protrusion 616, such that an elastic force isprovided by the elastic element to drive the touch portion 614 torecover from the state shown in FIG. 9 to the state shown in FIG. 8. Forexample, the protrusion 616 could also be an elastic element to providea greater elastic force for the touch portion 614 to recover.

In FIG. 9, the switch element 618 is turned on by the protrusion 616,such that the touch portion 614 emits a light signal 30 actuating theoperation surface 20. However, the light signal 30 is extinguished whenthe tip of stylus 610 leaves the operation surface 20, as FIG. 8 shown.For example, the exertion force applied to the touch portion 614 may besensed by a detector (not shown), and the detecting mechanism isreferring to other embodiment in the present invention. In other words,the detector fixed on the blocking plate 615 a also can be added whenthe stylus is designed to combine the pressure-sensitive function todraw a variable line width by a user's exertion force. In some examples,the switch element 618 is not only a switch, but also integrates adetecting function. In other examples, the detector is embedded in theprotrusion 616 such that the protrusion 616 is capable of sensing thelevel of the contact pressure. The contact pressure is generated betweenthe operation surface 20 and the touch portion 614 when exerting andtransmitted to the converter 617. The converter 617 is disposed in thepipe 612 and electrically connected to the protrusion 616, wherein theconverter 617 is suitable for transducing the analog signal into adigital signal and outputting the digital signal to the RF transmittingmodule 619. The RF transmitting module 619 is essentially consisted of aRF transmitter and an antenna for transmitting depressing pressureinformation. The RF transmitting module 619 is arranged to send thedigital signal to the RF receiving module 10 electrically connected tothe operation surface 20.

In one embodiment, the protrusion 616 is, for example, screwed to theblocking plate 615 a, and a user can rotate the protrusion 616 to adjusta distance between the protrusion 616 and the switch element 618. Insome embodiments, the protrusion 616 is designed in a constant distanceat the manufacturing stage. The switch element 618 is, for example,electrically connected to the battery module 615 and the touch portion614 by conductive wires 613. In addition, the switch element 618 has twocontacts in a Surface Mount Device (SMD) or four contacts in a DualIn-line Package (DIP).

FIG. 10 illustrates a light emitting glove according to an embodiment ofthe present application. FIG. 11 illustrates a finger portion of thelight emitting glove of FIG. 10. Referring to FIG. 10 and FIG. 11, thelight emitting glove 700 includes a glove 710, a control circuit board720, a plurality of light emitting elements 730 and a plurality ofconnecting wires 740.

The glove 710 includes an outer layer 712 and an inner layer 714 andhaving a plurality of finger portions 710 a˜710 e (FIG. 10 illustratesfinger portion 710 a). The control circuit board 720 is disposed betweenthe outer layer 712 and the inner layer 714. The light emitting elements730 are, for example, light emitting diode elements and disposed on thefinger portions 710 a˜710 e respectively, wherein each of the lightemitting elements 730 has a micro switch assembly 732. The connectingwires 740 are disposed between the outer layer 712 and the inner layer714, wherein the light emitting elements 730 are electrically connectedto the control circuit board 720 by the connecting wires 740respectively.

A user can wear the light emitting glove 700 and touch a display panelby the finger portions 710 a˜710 e. When one or more of the fingerportions 710 a˜710 e contact(s) the above mentioned the display panel,the corresponding micro switch assemblies 732 are pressed, and thecorresponding light emitting elements 730 are driven to emit light forexecuting a touch input function. The touch input manner described inFIG. 1 to FIG. 9 can be applied to the micro switch assembly 732described here.

In this embodiment, the light emitting glove 700 further includes abattery 750 and a plurality of rubber layers 760. The battery 750 isdisposed on the control circuit board 720 for providing electric powerto the control circuit board 720 and the light emitting elements 730.The rubber layers 760 covers the ends of the finger portions 710 a˜710 erespectively and each of the rubber layers 760 has at least one (showingtwo) heat dissipation opening 762 for dissipating the heat generated bythe corresponding light emitting element 730 or user's hand.

Referring to FIG. 10, each of the connecting wires 740 has a pluralityof curled portions 742 for being flexible, such that the user wearingthe light emitting glove 700 can crook his fingers without pulling apartthe connecting wires 740. In this embodiment, each of the curledportions 742 is flattened between the outer layer 712 and the innerlayer 714 in order not to occupy the inner space of the glove 710.

FIG. 12 illustrates an operating manner of the light emitting glove ofFIG. 10. Referring to FIG. 12, the control circuit board 720 includes acontrol circuit 722, an RF transmitting module 724 electricallyconnected to the control circuit 722, a driver 726 electricallyconnected to the control circuit 722 and a charging socket 724 for thebattery 750 to be charged. The battery 750 provides electric power tothe control circuit 722. The control circuit 722 drives the RFtransmitting module 728 to transmit an RF signal to the RF receivingmodule 54 of the electronic device 50, such that a touch input functionof a touch panel 52 of the electronic device 50 is turned on.

When a user wearing the light emitting glove 100 contacts a touch panel52 of an electronic device 50 by fingers, the micro switch assembly 732is pressed, and the control circuit 722 drives the light emittingelement 730 to emit light by the driver 726, and the touch panel 52receives the light emitted by the light emitting element 730, such thata touch input function is executed. Those skilled in the art shouldappreciate that any of the aforementioned embodiments and combinationscould be applied in the finger portions 710 a-710 e.

In summary, the stylus of the present invention is able to transmit anelectrical signal directly proportional to a contact pressure applied tothe touch portion of the stylus, and the display device is able toreceive the electrical signal to display a line width according to theelectrical signal. In other words, a width of the line displayed by thedisplay device is able to be changed by different electrical signalstransmitted from the stylus, such that the operation of the touch inputsystem is more flexible. In addition, when the touch portion of thestylus contacts an operation surface and a contact pressure is appliedto the touch portion, the touch portion is pushed toward andelectrically connected to the battery module to emit light signalactuating the operation surface, such that the operation of the stylusis facilitated.

It will be apparent to those skilled in the art that variousmodifications and variations may be made to the structure of the presentinvention without departing from the scope or spirit of the invention.In view of the foregoing, it is intended that the present inventioncovers modifications and variations of this invention provided they fallwithin the scope of the following claims and their equivalents.

What is claimed is:
 1. A touch input system, comprising: a stylus,comprising: a pipe, having a front end, a back end opposite to the frontend and an opening formed at the front end, wherein a diameter of theopening is smaller than a diameter of the pipe; a battery module,disposed within the pipe; a touch portion, sliding disposed at theopening and having an emitting element, wherein at least a part of thetouch portion is located in the pipe; a detector, disposed between thebattery module and the touch portion, and used to detect a signal fromthe emitting element to obtain a variation of a distance between thetouch portion and the detector; a protrusion, disposed within the pipe;and a switch element, fixed and electrically connected to the touchportion, and has an elastic element, wherein the touch portion is drivento move toward the back end by an exertion force, the switch element ispushed forward to contact the protrusion for actuating the touch portionto emit a light signal, and the elastic element is compressed betweenthe touch portion and the protrusion; and a display device, comprising:a display region, detecting the light signal to locate a touch positionwhen the touch portion is exerted on the display region, wherein thedisplay region displays a line width according to the variation of thedistance detected by the detector.
 2. The touch input system as claimedin claim 1, wherein the protrusion is an elastic member.
 3. The touchinput system as claimed in claim 1, wherein the display device furthercomprising: a light sensor array, arranged in a pixel electrode array ofthe display region.
 4. The touch input system as claimed in claim 1,wherein the detector is suitable for detecting a contact pressureapplied to the touch portion and transmitting an electrical signalaccording to the variation of the distance.
 5. The stylus as claimed inclaim 4, wherein the electrical signal provides information formagnitude of the contact pressure.
 6. The stylus as claimed in claim 4,further comprising: a RF transmitting module, disposed within the pipe,electrically connected to the detector, and transmitting the electricalsignal.
 7. The stylus as claimed in claim 4, wherein the display regiondisplays a line width according to the electrical signal.
 8. The stylusas claimed in claim 6, wherein the display device further comprises: aRF receiving module, electrically connected to the display device andused to receive the electrical signal.
 9. The stylus as claimed in claim8, wherein the display region receives the electrical signal via the RFreceiving module.